Larry Wall wrote in perl.perl6.language :
>
> Such a grammar switching routine could operate either over a lexical
> scope or over the rest of the file. The only restriction is that
> one module not clobber the grammar of a different module.
>
> Basically, we're trying to make the opposite mistake of the one
> we made with source filters. :-)
I see that. But should it be possible to import grammar rules,
to allow :
use Some::Module::That::Modifies::A::Grammar::Rule;
# continue to parse the perl program with the modified grammar
or even :
{
use Some::Module::That::Modifies::A::Grammar::Rule;
# continue to parse the block with the modified grammar
}
And what about switching to a different or modified tokenizer ?
